Quran 12:27

وَإِن كَانَ قَمِيصُهُ ۥ قُدَّ مِن دُبُرٍ۬ فَكَذَبَتۡ وَهُوَ مِنَ ٱلصَّـٰدِقِينَ ٢٧

"And if his garment is torn from the back, then she lied, and he is telling the truth."